Which one of the following phenols does not give colour when condensed with phthalic anhydride in presence of conc. H₂SO₄ ?

The bond order and magnetic behaviour of $$O_2^ - $$ ion are respectively :

Given below are two statements : one is labelled as Assertion (A) and other is labelled as Reason (R).

Assertion (A) : Sucrose is a disaccharide and a non-reducing sugar.

Reason (R) : Sucrose involves glycosidic linkage between C₁ of $$\beta$$-glucose and C₂ of $$\alpha$$-fructose.

Choose the most appropriate answer from the options given below :

Match List - I with List - II :


Choose the most appropriate match :